Caroline, the store manager at a jewellery store, conducts nationwide market research and collects data on customer preferences toward various jewellery items. Based on her findings, she must recommend the items customers are more likely to buy and the items the store should promote more so that profits can be maximized. In this case, what role will Caroline be performing?

a$.$ the descriptive role of marketing research

b$.$ the diagnostic role of marketing research

c$.$ the prescriptive role of marketing research

d$.$ the predictive role of marketing research